linux-kernel - [PATCH] drivers: watchdog: pika_wdt: add __ro_after

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Message-Id: <1482652824-8648-1-git-send-email-bhumirks@gmail.com>
Date:   Sun, 25 Dec 2016 13:30:24 +0530
From:   Bhumika Goyal <bhumirks@...il.com>
To:     julia.lawall@...6.fr, wim@...ana.be, linux@...ck-us.net,
        linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     keescook@...omium.org, Bhumika Goyal <bhumirks@...il.com>
Subject: [PATCH] drivers: watchdog: pika_wdt: add __ro_after_init to ident

The object ident of type watchdog_info structure is not
modified after getting initialized by pikawdt_init. Apart from getting
referenced in init it is also passed as an argument to the function
copy_to_user but this argument is of type const void *. Therefore add
__ro_after_init to its declaration.

Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
---
 drivers/watchdog/pika_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/pika_wdt.c b/drivers/watchdog/pika_wdt.c
index 0cdfee2..e35cf5e 100644
--- a/drivers/watchdog/pika_wdt.c
+++ b/drivers/watchdog/pika_wdt.c
@@ -54,7 +54,7 @@
 	struct timer_list timer;	/* The timer that pings the watchdog */
 } pikawdt_private;
 
-static struct watchdog_info ident = {
+static struct watchdog_info ident __ro_after_init = {
 	.identity	= DRV_NAME,
 	.options	= WDIOF_CARDRESET |
 			  WDIOF_SETTIMEOUT |
-- 
1.9.1